Copy Backup Files

I have a script to copy backup files.

This is what is does:

--Make a new directory to hold last month's backup files
SET @cmd = 'mkdir C:\dest\Archive\' + CONVERT(char(6), DATEADD(month, DATEDIFF(month, 0, getdate()) -1, 0), 112)
EXEC master..xp_cmdshell @cmd, NO_OUTPUT

--Loop through the filenames in the temp table and copy them to the new directory
DECLARE @current_dir varchar(255)

DECLARE test_cursor CURSOR FOR
SELECT
current_dir
FROM #test_archive

      
OPEN test_cursor
FETCH test_cursor INTO
@current_dir

WHILE (@@FETCH_STATUS = 0)
BEGIN


     SET @cmd = 'copy' +  @log_current_dir + 'C:\test\PLFullArchive' + CONVERT(char(6), DATEADD(month, DATEDIFF(month, 0, getdate()) -1, 0), 112)
      EXEC master..xp_cmdshell @cmd, NO_OUTPUT

      FETCH test_cursor INTO
      @current_dir
END



CLOSE test_cursor
DEALLOCATE test_cursor


The # test_archive temp table contains :

current_dir
C:\source\Archive\test_20071029_LOG_flip2.TRN
C:\source\Archive\test_20071029_LOG_flip2.TRN
C:\source\Archive\test_20071029_LOG_flip2.TRN
C:\source\Archive\test_20071029_LOG_flip2.TRN
C:\source\Archive\test_20071029_LOG_flip2.TRN
C:\source\Archive\test_20071029_LOG_flip2.TRN
C:\source\Archive\test_20071029_LOG_flip2.TRN

For some reason the copy command does not copy the files to the destination.
Is there something I am missing here.
This is part of a larger stored procedure.
You can run the copy command seperately.

Thanks